The aim of this paper is to explore alternative ways to determine the vibration characteristics of wind turbine blades to reduce the amount and duration of needed tests without compromising the quality of the retrieved information. Applied test setup configuration, test specimen mounting and measurement equipment are known to affect the test results. The investigation concerns the use of Operational Modal Analysis (OMA) method together with the existing instrumentation for fatigue and static testing. The wind turbine blade is clamped to the support structure and instrumented by means of many strain gauges. A so-called pull and release test can be performed,and the modal parameters can be obtained by analyzing the measured strains during this type of test. Numerical correlation can then be performed with respect to the validated FE model of the clamped blade allowing to enrich the acquired information.

Type:

Conference paper

Language:

English

Published in:

Proceedings of the 8th International Operational Modal Analysis Conference, 2019